There's no map showing all the billions of exoplanets hiding in our galaxy -- they're so distant and faint compared to their stars, it's hard to find them. Now, astronomers hunting for new worlds have established a possible signpost for giant exoplanets.

N'Djamena (AFP) - Chad is to boost protection for a key haven for endangered wildlife in the south of the country under an agreement with a conservation group. African Parks is to take over management and protection of a territory of high ecological value that lies around the vast Zakouma National Park in southern Chad. The programme will help beef up security at the Siniaka Minia and Bahr-Salamat reserves around the park, as well as vital corridors used by fauna, African Parks said in a statement.